16 Oct 2004 12 UTC
Clearly a frontal cloudband can be seen in between Greenland and Iceland. This baroclinic zone is important to
follow in time accurately.
16 Oct 2004 18 UTC
As the frontal cloudband moves over Iceland even some decaying can be seen.
17 Oct 2004 00 UTC
Behind the frontal cloudband some fractional/convective clouds can be seen which are indicative for an upper level
trough that moves in from Greenland.
17 Oct 2004 06 UTC
Just northeast of Iceland a thickening of the frontal cloudband can be observed, whereas at the south of Iceland
still a decaying process can be seen. This process is caused by the approaching of an upper level trough and
results in the formation of a wave structure.
17 Oct 2004 12 UTC
As the waving process goes on, from a satellite-meteorology point of view a typical cyclogenesis event can be identified
17 Oct 2004 18 UTC
Southeast of Iceland clearly a dark core in the frontal wave can be seen, which is indicative for a cyclonic flow in
the middle and upper levels.
18 Oct 2004 00 UTC
The cyclone has a mature stage now the dark core now has developed to a typical dry intrusion. This dry intrusion
can be identified much better with use of WV-imagery, which will be done in the next section.
18 Oct 2004 06 UTC
As the cyclone becomes more mature the development of an occlusion spiral can be seen. Note also that the movement
of the whole system is very marginal.
18 Oct 2004 12 UTC
At the rear of the coldfront a comma cloud can be seen which approaches
the frontal cloudband, this secondary process is called Instant Occlusion.
18 Oct 2004 18 UTC The mature cyclone is getting a larger scale. At the rear side of the cyclone
cellular convective cloudiness can be detected which is a sign of a flow of unstable arctic air.
19 Oct 2004 00 UTC South of Iceland the mature cyclone can still be seen very well. Because of an Easterly
flow over Iceland (At the north side of the cyclone), some lee clouds develop.
19 Oct 2004 06 UTC Now the decaying becomes visible very clear. The system is loosing structure and falling
apart into different convective structures.
19 Oct 2004 12 UTC Convective structures are now prevailing the system is not recognizable anymore.
